minor symfony#10463 Update form_login_setup.rst (Zamir10)

This PR was merged into the 3.4 branch.

Discussion
----------

Update form_login_setup.rst

<!--

If your pull request fixes a BUG, use the oldest maintained branch that contains
the bug (see https://symfony.com/roadmap for the list of maintained branches).

If your pull request documents a NEW FEATURE, use the same Symfony branch where
the feature was introduced (and `master` for features of unreleased versions).

-->

Commits
-------

73bf5e1 Update form_login_setup.rst

Author: javiereguiluz

security/form_login_setup.rst

@@ -98,7 +98,7 @@ configuration (``login``):
             /**
              * @Route("/login", name="login")
              */
-            public function login()
+            public function loginAction()
             {
             }
         }
@@ -142,7 +142,7 @@ Great! Next, add the logic to ``loginAction()`` that displays the login form::
     // src/AppBundle/Controller/SecurityController.php
     use Symfony\Component\Security\Http\Authentication\AuthenticationUtils;
 
-    public function login(AuthenticationUtils $authenticationUtils)
+    public function loginAction(AuthenticationUtils $authenticationUtils)
     {
         // get the login error if there is one
         $error = $authenticationUtils->getLastAuthenticationError();